X Basic Router Configuration Steps

providing legal notification

(config)# bannet motd [delimiter] [message] [delimiter]

securing privileged EXEC mode

(config)# enable secret <password>

device name configuration

(config)# hostname <hostname>

enter interface configuration mode

(config)# interface [type-and-number]

securing user EXEC mode

(config)# line console 0 (config-line)# password [password] (config-line)# login

securing all passwords in the configuration file

(config)# service password-encryption

add interface configuration description (good practice)

(config-if)# description [description-text]

set IPv4 address to interface configuration

(config-if)# ip address [ipv4-address] [subnet-mask]

set IPv6 address to interface configuration

(config-if)# ipv6 address [ipv6-address/prefix-length]

save interface configuration

(config-if)# no shutdown

securing remote Telnet / SSH access

(config-line)# line vty 0 4 (config-line)# password [password] (config-line)# login (config-line)# transport input {ssh | telnet}

on inter-router connections where there is no Ethernet switch...

...both interconnecting interfaces must be configured and enabled

packets that originate from host computers connected to the switch must already have...

...the default gateway address configured on their host computer operating systems

tasks to be completed when configuring initial setting on a router:

1. device name 2. secured privileged EXEC mode 3. secured user EXEC mode 4. secured remote Telnet / SSH access 5. secured all passwords in the config file 6. provided legal notification 7. saved configuration

saving configuration file

# copy running-config startup-config

verification of interface configuration (IPv4)

# show ip interface brief

display contents of IP routing table in RAM

# show ip route

verification of interface configuration (IPv6)

# show ipv6 interface brief

switch local interface (SVI)

interface that is configured to connect and manage a switch over a local IP network

limitation of description text

no longer than 240 characters

default gateway address

the router logical interface address attached to the local network of the host

Layer 2 device

a switch that interconnects client computers